From the first forms of life to the Cambrian explosion

What is referred to as a chemical soup?

• Mineral-rich hot water released by underwater volcanic activity.

• Mr Shivairo's favorite soup

• Ocean water full of brown algea

• Shallow ocean water inhabited with stromatolites

What were the first forms of life?

• Stromatolites

• Bacteria

• Sponges

• Trilobites

What did stromatolites do?

• They produced sugars.

• They created iron ore.

• They cleaned ocean water.

• They produced oxygen.

What is photosynthesis?

• A new photo-editing software

• The respiration process of plants

• The production of sugars with the help of sunlight.

• The chemical process for developing films

What is iron oxide?

• Iron ore

• Rust

• A special magnet

• Iron used for construction work

What was the name of the first supercontinent?

• Laurasia

• Gondwana

• Pangea

• Rodinia

What caused the formation of snowball Earth?

• Rock surfaces absorbed CO2.

• The sun did no longer shine so intensively.

• An meteorite collided with Earth bringing lots of ice.

• The increased greenhouse-effect.

How did Earth get out of the snow ball state?

• The sun melted the ice.

• By volcanoes releasing CO2 into the atmosphere, creating stronger greenhouse-effect.

• The inside of the earth warmed up thus melting the ice.

• Due to meteorites bombarding the Earth.

Cells with a defined nucleus are

• brown algea

• prokaryotes

• green algea

• eukaryotes

How do mountains form?

• By continents colliding

• By fumaroles

• By volcanic activity

• By rocks accumulating